问题
I have a list of strings in this format:
['5,6,7', '8,9,10']
I would like to convert this into the format:
[(5,6,7), (8,9,10)]
So far I have tried this:
[tuple(i.split(',')) for i in k]
And I obtain:
[('5','6','7'), ('8','9','10')]
I am a bit stuck on how to simply convert the strings into tuples of integers. Thank you
回答1:
If your strings are strings representation of number, then:
[tuple(int(s) for s in i.split(',')) for i in k]
回答2:
The following solution is for me the most readable, perhaps it is for others too:
a = ['5,6,7', '8,9,10'] # Original list
b = [eval(elem) for elem in a] # Desired list
print(b)
Returns:
[(5, 6, 7), (8, 9, 10)]
The key point here being the builtin eval() function, which turns each string into a tuple.
Note though, that this only works if the strings contain numbers, but will fail if given letters as input:
eval('dog')
NameError: name 'dog' is not defined
回答3:
Your question requires the grouping of elements. Hence, an appropriate solution would be:
l = ['5','6','7', '8','9','10']
[(lambda x: tuple(int(e) for e in x))((i,j,k)) for (i, j, k) in zip(l[0::3], l[1::3], l[2::3])]
This outputs:
[(5, 6, 7), (8, 9, 10)]
As desired.
来源：https://stackoverflow.com/questions/25478881/convert-a-list-of-strings-to-a-list-of-tuples-in-python